(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*

This guide provides a more detailed description of the syntax that is supported along with examples.

This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.

Concept Search - What can I type?

For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.

Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.

Publishing Venue

Related People

Abstract

By using the block multiplexer channel on the IBM System/370 a random collection of a field of data from an I/O device such as a 1287 Optical Reader can be buffered and transferred in blocks, rather than one complete field. When capturing noncoded information on the Reader the time between data transfers varies. By using the Command Retry feature (US Patent 3,688,274) of the block multiplexer, the data can be buffered until a block is ready to be transferred. The channel continues to issue chained read commands with the Suppress Length indicator turned off. The last read command will not have a completely filled block. It will break the chain of read commands, exiting back to the user's program.

Country

United States

Language

English (United States)

This text was extracted from a PDF file.

This is the abbreviated version, containing approximately
100% of the total text.

Page 1 of 1

Partitioning Data Blocks for Multiplexer Channel

By using the block multiplexer channel on the IBM System/370 a random
collection of a field of data from an I/O device such as a 1287 Optical Reader can
be buffered and transferred in blocks, rather than one complete field. When
capturing noncoded information on the Reader the time between data transfers
varies. By using the Command Retry feature (US Patent 3,688,274) of the block
multiplexer, the data can be buffered until a block is ready to be transferred. The
channel continues to issue chained read commands with the Suppress Length
indicator turned off. The last read command will not have a completely filled
block. It will break the chain of read commands, exiting back to the user's
program.

The use of the Command Retry allows the channel to service other machines
when the Reader is not transferring data. This differs from selector channel
operation, which requires the Reader to complete the entire field before another
device can be serviced.

Conventional use of Command Retry is described in IBM's OEM Information
Manual (IBM S/360 and S/370 I/O Interface channel-to-control unit, Systems
Reference Library Form GA22-6974-0, Page 29). Presently, devices use
Command Retry to seek to a field of data, thus freeing up the channel during
seek. This application additionally frees the channel while acquiring the data and
then buffering it.